Demountable rim.



C. R. RAGSDALE. DEMOUNTABLE mm.

\ APPLICATION HLED JUNE 2|. I51?- 1,275,745.

Patented. Aug. 13, 1918.

2 SHEETS-SHEET I.

l IVVE/VTOR Ci/Bfhysdaie ATTORNEYS C. R. RAGSDALE.

DEMOUNTABLE RIM.

AP PLICATIONFILED JUNE 21.1917. 1,275,745. r Patented Aug. 13, 1918.

2 SHEET$SHEET 2.

WITNESSES 3 mmvroe I 615.80g q ATTORNEYS onantrs n. RAGSDALE, on ST. LOUIS, mrsso'um.

nnmonm'nnnn RIM.

To all whom it may concern: Be it known that I, CHARLES Reno Bees- DALE, a citizen of the United States, and resident of St. Louis, in the State of Missouri, have invented a new and Improved Demountable Rim, of which the following is a full, clear, and exact description.

This invention relates to wheelshaving interchangeable pneumatic tires or. their equivalent and has particular reference to simple, reliable and easily operated means for effecting the interchange of the tire supporting rims. A further object of the invention is to provide a demountable rim construction for wheels in which no bolts, nuts, or wedges are required to hold the tire supporting rim on the felly or felly rim. r

With the foregoing and. other objects in view the invention consists in the arrange ment and combination of parts hereinafter described and claimed, and while the invention is not restricted to the exact details of construction disclosed or suggested herein,

still for, the purpose of illustrating a practical embodiment thereof reference is had to the accompanying drawings, in which like reference characters designate the same a parts in the several views, and in which- I, Figure '1 18 a side elevation of v a oonventlonal form of wheel showing my mprovement applied thereto, parts being broken away to better illustrate the interlocking natures of my improvement.

Fig. 2 is a fragmentary detail view indieating a preferred form of locklng'plate and the parts cooperating therewith and indicating what will be regarded in this specification for convenience of description, as the bottom portion of tl1e wheel.

Fig. 3 is a vertical transverse section "of the wheel on the line 3-3 of Fig. 1 showing the parts in locked position.

Fig. i is a view similar to that of Fig. 3 prior to the insertion of the keeper.

Fig. 5 is a fragmentary detail view of the upper portion of the wheel and sh wing particularly one pair of co'iiperating'lugs' or blockssecnred tovthe tire rim and felly rim respectively. Fig. J is a view of a modification of the par ts represented. by Fig. 5. v

,Fig. is a modificatiomof the parts'rep resented in Fig. 2; and

f. 8 is a cross sectionassembly vlew of firm shown in Fig. 7

Specification of Letters Patent.

, Patented'Aua. 13. 1.918.

Appllcation'flled June 21, 1917. Serial No. 176,074.

Referring now more particularly. toilFigs. 1. to 5 I show a wheel comprising a telly 10 to which is connected in any well known manner a felly rim or ;band 11' having .parallel outwardly projecting edge flanges 12.

. 13 iridicatesa tire supportin rim adapted for coii oration with any suita leor conventional mm of shoe S having an'inner' tube T to which is connected an air valve 14.

While the parts thus far described may be of any suitable or conventional design or construction, it is desirable and contemplated within the scope of this invention that both of the rims may be solid around their circumferences, and hence the tire rim 13 is designed so that its inner circumference will be as great as that of the periphery of either of the flanges flanges are of different diameters whereby the tire rim may be passed readily over said fianges12. The shoe S carrying placed upon the t1rerim13-as tolhave the air valve 14 extend inwardlythrough a hole 15 formed in said rim; The folly rim, and felly are likewise provided-with a hole 15' adapted to register with accommodation of the valve as has been done heretofore. i y I will now specifically describe my improved interlockmgdevices for'securin the tire rim and tireto'the felly band. "call attention first of all to a pair vojf blocks-or plates 16 riveted or otherwisT-srigidly secured upon the inner surface-o the tire rim on oppositesides circumferentially of the valve hole 15 and spaced from 'eajchother apof the abutting of the the ttb 'iijeiiitgsg the hole 15 for the lateral movement of the and so. spaced from eac 12 or the smaller of them if the 16 against the flanges 12. I

These 'latesy erenother and from-[said hole'that the edges 7 thereofneares'tto the. abut squarely against the ed 16 farthest from the valve.

hole areadapted to es of theblocks ole 15 in practice. It follows therefore that while the flanges 12 abutting against the ends of the blocks prevent lateral movement oi the tire rim in either direction. cirruinferent-ial movement of the tire rim is prerei'ited positively by one oi the plates cooperating with its block and cireumrerential movement ot the tire in the opposite direction is prevented. by the other pair of numbers 16 and 17, as will be seen in Fig. 1. It will be noted also in this figure that the thickness of the blorlcs 16 with respect to the radius of the wheel corresponds substantially to the normal space between the main portions of the two rims 11 and 13.

At any other convenient portions of the rims, usually at two points on ordinary wheels, 1 provide pairs of lugs 18 shown in this case as two in number and secured rigidly in any suitable manner asby riveting to the inner surfaceof the. tire rim 13 and diametrically opposite the pairs of locking plates '16 and 17. Each pair of lugs 18 are spaced a. slight distance from each other circumferentially of the rim and. the lugs are located centrally of the tire rim 13 or midway between the side edges or flanges thereof. j

19 indicates a locking plate curved to conform to the outer face of the telly rim ].1

and having a lateral width equal to the space between the flanges 12. This plate is provided with a pair of pa-rallel'slots 20 shown as of rectangular form and adapted to receive the pair of lugs 18. It wi]l thus be seen thativith the plate. 19 cotiperatlng with the two lugs 18 and with the side edges or ends'of the plate abutting against the inner faces of the flanges 12 itwiIl-he imposslble for the rim 13 adjacent to these features to be displaced laterally of the folly rim 11.

The manner-of assemblage may be briefly summarized as follows in view of the fore going description of the mechanism: With the wheel jacked up and turned. with the plates 17 andhole 15" at the to the tire rim and tire secured thereto will t en be placed over the top of the felly rim with the valve 14; projected through the hole 1.5, the lugs 16 coming down against or toward the then upper edges ofthe plates 17 The locking plates 19 then being titted loosely upon the respective pairs of lugs 18 the bottom of the tire and tircrim may pass frcely into or toward the general plane of the wheeland occupy the position shown in Fig. 4, it being noted that the radial dimension or thick nessof the lugs and locking plate isno greater than the space between the tire rim 13 and that flange 1.2 over which said tire rim is moved. The next step then .is. to insert a keeper 21 for each locking plate 19 This keeper is introduced laterally from the side of the wheel so as to occupy a position between the two lugs 18 of each pair and against theend walls of the slot. words the cooperation between the extension also between a locking plate 19 and the inner surface of the rim l3, the keeper serving thereby to force the locking plate radially toward the axis of the wheel so as to 0G- eupy a snug position between the flanges 12 of the telly rim 11 as shown in Fig. 3. From this figure it will be. observed that the thickness of the plate is greater than the radial width of the flanges 12 and also that the combined radial thickness of the lugs 18 and the plate 19 in interlocking position is greater than the clear space between the flanges 12 and the tire rim, whereby it is impossible for this part of the tirerim to be displaced laterally from the folly rim. In

order to demount th'etire and rim all that is of the flanges 12, when the tire and tire rim 1.3 may her-removed from the whee'hby a. simple operation reverse to. the steps of assemblage above set. forth.

Figs. 6, 7 and 8 indicate that adaptation of in y invention for use in connection with a felly rim or band 22 having a smooth outer surface or without flanges corresponding to the flanges. 12. 17 secured to this band similarly to those shown in connection with the rim. 11 and'tor similar purpose. I platesl7 the band 22 is formed with a trans verse slotwith which cooperates a. lag extension 24 of the block 16 carried by the tire rim [3. While the block 16' cooperates with the plate 17, as above described, to prevent circumferential movement of the the rim with respect to the telly band the ex-' tension 24 projectinginto the slot 23will prevent lateral movement by reason of. the abutting of the ends of the extension. 24 In other 21 and the walls of the slot 23 takes the place'of the cooperation between-the block 16 and the flanges 12 of Fig. 5. At the bottom of the wheel the pairs 0 lugs 18 are secured to or formed on the tire rim 13 substantially the same as shown in Fig. 2, the keeper 21 acting between said lugs. The locking plate 19. while cooperatiag withthelugs 18in theslots 20 as already explailied, a lug extension 25 carried by the When the keep I employ, however, plates Adjacent to each of the.

' upon the felly band quite as securely as if the flanges 12 were used. Obviously the entering edges or corners of the interlocking blocks or lug extensions may be rounded or beveled as may be desired to facilitate the manipulation of the device.

I claim: a

1. In a demountable rim construction, the combination of a Wheel having a folly rim thereon, a pair of outwardly projecting plates carried by the rim, an endless unbroken tire rim surrounding the telly rim, a pair of blocks carried upon the inner surface of the tire rim and spaced circumferentially froui each other approximately .90 degrees and projecting into engagementwith the felly rim and also abutting against said plates to prevent relative circumferential movement between the rimsin either direction, the felly rim being so constructed that portions of the blocks cooperate therewith toprevent lateral movement of the tire rim, and means cooperating with other portions of the two rims to lock the same in place and to make the interlocking engagement between the blocks and felly rim positive and secure.

2. In a demountable rim'construction, the combination of a Wheel including a telly rim, a tire rim surrounding the same, means acting between the two rims along one portion of the circumference of the Wheel serving to prevent relative movement between the rims either laterally or circumferenlially and other means cooperating with an.- other circumferential portion oi" the wheel laterally serving to make the first mentioned interlocking means positive and secure and also serving to prevent relative lateral movement between jhe two rims, the last mentioned interlocking means including a pair of lugs fixed to one of the rims, a loose locking plate cooperating with said lugs and movable radially of the wheel along the same into interlocking engagement with the other rim, and a keeper fitted removably between said lugs and serving to force sai plate snugly into interlocking engagement with the rim not having the lugs.

3. In a demountable rim, the combination with a wheel including a lelly rim and a tire rim surrounding the same, of inter locking blocks and plates carried by one circumferential portion of the two rims and serving to prevent relative movement between the same either circumferentially or said blocks and plates being brought into interlocking position by a movement of the tire in a diametrical direction while the opposite circumfereni'ial' portion of the tire rim is slipped freely over the corresponding portion of the felly rim in a direction approximately parallel to the axis of the wheel, interlocking means between the latter mentioned portionof the wheel and the tire rim surrounding the same, said last mentioned interlocking means includinga pair of spaced lugs carried upon the inner surface of the tire rim, a loose locking plate having a pair of openings corresponding to said lugs and fitted over the same and adapted to move radially of the wheel into engagement with the fellty rim, means acting between the plate and the :t'elly rim to prevent relative lateral movement between therims adjacent thereto and a, keeper located circumferentially be tween the lugs and radially between. the plate and the tire rim serving to hold the ionizing plate in snug interlocking engagement with the felly rim.

CHARLES R. RAGSDALE. 

